Full TGIF Record # 19693
Item 1 of 1
Publication Type:
i
Report
Author(s):Potter, D. A.; Gordon, F. C.; Arnold, T. A.; Cockfield, S. D.
Title:Efficacy of insecticides for control of Japanese beetle grubs in Kentucky
Source:Kentucky Turfgrass Research. 1983, p. 26-28.
Publishing Information:Lexington, KY: University of Kentucky, College of Agriculture, Cooperative Extension Service
Keywords:TIC Keywords: Popillia japonica; Poa pratensis; Insecticides; Insect control; Evaluations; Isofenphos; Isazophos; Ethoprophos; Diazinon; Chlorpyrifos; Metolachlor; Grubs; Application rates; Formulations
Abstract/Contents:1983 test of currently registered and experimental insecticides (Oftanol, Mocap, Triumph, Dymet, Diazinon, and Dursban) for controlling Japanese beetle grubs (Popillia japonica) in Kentucky bluegrass. The main test was on an irrigated fairway at Lakeside Golf Course, Lexington, KY. with initial infestation level of about 8 third-instar Japanese beetle grubs/ft2. Thatch was negligible, temperature at the time of treatment (9am Aug. 31, 1983) was 85 degrees Fahrenheit. The water pH for mixing sprays and irrigation was 6.2. The site was irrigated with about 1 1/2 inches of water after the insecticides were applied. Excellent control was obtained with OftanolR 2F and 5G after 4 weeks. However, many grubs were still alive after 9 days in the Oftanol-treated plots. This is consistent with previous reports that Oftanol is a relatively slow-acting insecticide. MocapR (ethoprop) at a rate of 10 lbs a.i./acre provided good control after 9 days and 4 weeks, but was somewhat less effective at the 5 lb a.i./acre rate. TriumphR (CGA-1223) and DymetR at the 9.6 lb rate provided fairly good control, whereas diazinon, all DursbanR formulations, and DymetR at the 4.8 lb rate were relatively ineffective. The failure of diazinon to give adequate control was unexpected, since diazinon in both the 14G and AG500 formulatins has given excellent control of masked chafer grubs in Kentucky. To confirm the effectiveness of diazinon vs. Mocap, a second test was conducted in another, more heavily infested fairway (about 18 grubs/ft2). Plots were treated on Sept. 12, 1983. In the second test, Mocap at the 10 lb rate gave better control than diazinon. Results of these 2 tests that Oftanol and Mocap are the most effective insecticides for controlling Japanese beetle grubs in Kentucky. Granular Oftanol is currently registered for use on turf. For both tests, insecticides, formulation, application rate, and grub density 9 days and 4 weeks after treatment are provided in a table.
Language:English
References:0
Note:Tables
Geographic Terms:Kentucky
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Potter, D. A., F. C. Gordon, T. A. Arnold, and S. D. Cockfield. 1983. Efficacy of insecticides for control of Japanese beetle grubs in Kentucky. KY. Turfgrass Res. p. 26-28.
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